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THE formula is: 6 inches straight and 1 inch over would be a number 6 switch.....8 inches straight and one inch over would be a No.8 turnout, and so on. However if it is 8 inches straight and 2 inches over I believe it would be a No.4 turnout. Thus the formula for the turnout number would be inches straight divided by inches over------> 8/2 = 4 and 8/1 = 8 <br />JaMeS <br />
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